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TT: Tiefe Temperaturen

TT 20: Postersitzung IV (Mesoskopische Systeme, Supraleitung: Massivmaterialien, Bandleiter, Pinning, Vortexdynamik, Transporteigenschaften, Korngrenzen)

TT 20.29: Poster

Donnerstag, 27. März 2003, 14:30–19:00, P2c, P2d

Metal Organic Decomposition (MOD) for the preparation of epitaxial buffer layers for high temperature superconducting tapes — •Harald Jarzina¹, S. Sievers¹, H. C. Freyhardt¹, P. Lobinger², and H. W. Roesky² — ¹Institut für Materialphysik, Windausweg 2, 37073 Göttingen — ²Institut für Anorganische Chemie, Tammannstrasse 4, 37077 Göttingen

In order to obtain a high current carrying capability in thin layers of the high temperature superconductor YBa₂Cu₃O_7−d (YBCO), highly biaxially oriented growth has to be achieved. This is achieved by epitaxial nucleation and growth on a textured substrate. The processing of textured substrates (for example by Ion-Beam-Assisted-Deposition of ZrO₂:Y₂O₃-layers (YSZ)) requires elaborate technical equipment and is therefore cost intensive. It might be advantageous to deposit a thin nucleation layer (some ten nanometers in thickness) by IBAD, and subsequently to increase thickness and improve texture by MOD.

In this contribution the dependence of growth parameters of YSZ and CeO₂:Gd₂O₃ on the substrate properties (YSZ single crystals of various roughnesses, IBAD-YSZ of different in-plane texture, RABiTS) is investigated. A special focus will be on the superconducting properties of YBCO layers deposited on top of the buffer layers.

This work was supported by the EU under grant GRD2-2000-30163.